Analysis of Near-Field Magnetic Responses on ZrTe5 through Cryogenic Magneto-THz Nano-Imaging

Q3 Physics and Astronomy Instruments Pub Date : 2024-03-05 DOI:10.3390/instruments8010021
S. Haeuser, R. Kim, Joong-Mok Park, Randall K. Chan, M. Imran, T. Koschny, Jigang Wang
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Abstract

One manifestation of light-Weyl fermion interaction is the emergence of chiral magnetic effects under magnetic fields. Probing real space magnetic responses at terahertz (THz) scales is challenging but highly desired, as the local responses are less affected by the topologically trivial inhomogeneity that is ubiquitous in spatially averaged measurements. Here, we implement a cryogenic THz microscopy instrument under a magnetic field environment—a task only recently achieved. We explore the technical approach of this system and characterize the magnetic field’s influence on our AFM operation by statistical noise analysis. We find evidence for local near-field spatial variations in the topological semimetal ZrTe5 up to a 5-Tesla magnetic field and obtain near-field THz spectra to discuss their implications for future studies on the chiral magnetic effect.
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通过低温磁-THz 纳米成像分析 ZrTe5 上的近场磁响应
光-韦尔费米子相互作用的一种表现形式是在磁场下出现手性磁效应。在太赫兹(THz)尺度上探测真实空间的磁响应具有挑战性,但也是人们非常渴望的,因为局部响应受拓扑琐碎不均匀性的影响较小,而这种不均匀性在空间平均测量中无处不在。在这里,我们实现了磁场环境下的低温太赫兹显微镜仪器--这是最近才实现的任务。我们探索了该系统的技术方法,并通过统计噪声分析描述了磁场对原子力显微镜操作的影响。我们发现了拓扑半金属 ZrTe5 在 5 特斯拉磁场下局部近场空间变化的证据,并获得了近场太赫兹光谱,讨论了其对未来手性磁效应研究的影响。
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来源期刊
Instruments
Instruments Physics and Astronomy-Instrumentation
CiteScore
2.60
自引率
0.00%
发文量
70
审稿时长
11 weeks
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